相关疑难解决方法(0)

我正在使用应用于CATextLayer的自定义字体.我正在使用此处的教程和示例代码.http://www.freetimestudios.com/2010/09/13/custom-fonts-on-the-ipad-and-ios-4/

但是,每隔一段时间,我就会收到以下错误.没有什么特别可以触发它.有人可以说明这意味着什么吗？要检查什么？

CoreText: Invalid 'kern' Subtable In CTFont <name: Intellect, size: 20.000000, matrix: 0x0>
CTFontDescriptor <attributes: <CFDictionary 0xac07a80 [0x38295d98]>{type = mutable, count = 1, capacity = 3, pairs = (
    0 : <CFString 0x3833f750 [0x38295d98]>{contents = "NSFontNameAttribute"} = <CFString 0x159af0 [0x38295d98]>{contents = "Intellect"}

我使用以下代码加载字体.此代码取自上面链接中的项目.

- (CTFontRef)newCustomFontWithName:(NSString *)fontName
                            ofType:(NSString *)type
                        attributes:(NSDictionary *)attributes
{
    NSString *fontPath = [[NSBundle mainBundle] pathForResource:fontName ofType:type];

    NSData *data = [[NSData alloc] initWithContentsOfFile:fontPath];
    CGDataProviderRef fontProvider = CGDataProviderCreateWithCFData((CFDataRef)data);
    [data release];

    CGFontRef cgFont = CGFontCreateWithDataProvider(fontProvider);
    CGDataProviderRelease(fontProvider);

    CTFontDescriptorRef fontDescriptor = …